Refrigerating mechanism



April-15,1930.I TQJ, LITLE, JR 1,753,797

REFRIGERATING MECHANI SM Original Filed Sept. 18. 1926- z vBYJ Q NEYS.

Patented pr. 8, 1930 UNITED #.TATESl PATENT oFFlcl-z THOMAS J'. LITLE, JR., 0F INDIANAPOLIS, INDIANA, ASSIGNOR T0 COPELANI) PROD- 'UCTS, INC., OF DETROIT, MICHIGAN, A. CORPORATION 'OF MICHIGAN REFRIQERATING MECHANISM @riginal application 1 ed September 18, 1926, Serial No. 136,357. Divided and this `application filed April 10, 1929. Serial No. 353,910.

This invention relates to mechanical refrigerating mechanism and is a division of my 'application for Letters, Patent of the United States for improvements in mechani- 5 cally operated ref i erating systems filed vSeptember .18, 1926, `erial No. 136,357, Patent No. 1,713,234 dated May 14, 1929.

The object of my invention is to provide a motor in connection with 'a refrigerating w system which may be used to operate various culinary and vhousehold appliances independently of the operation of the refrigerant circulatory system.

A further object of my invention is to provide means for` rendering the refrigerant circulatory system inoperative when it is desired to use the. motor to operate various culinary and household appliances.

With these and other objects in view, my invention consists in the arrangement, cornbination and construction of the Various parts of my improved device, as described in the specification, claimed in my claims and shown in the accompanying drawings, in which:

Fig. 1 is a side elevation of a refrigerator cabinet with parts broken away and having a refrigerating system embodying my invention attached thereto.' 3o Fig. 2 is a sectional view of the compressor l of a refrigerating system embodying my invention.

Fig. 3 is a diagrammatic sketch of the electrical connection between the motor of said refrigerating system, and my invention.

c have shown a refrigerator cabinet l1 having a motor 6 with a refrigerant compressor 7 secured thereto, mounted on the cabinet top 2. Within thev up er is positioned a refrigerant vexpansion chamber 8, and on the exterior back wall of cabinet 1 is positioned a refrigeratconden'ser 9. The pipe 10 connects the compressor 7 with the condenser' 91; the pipe 11, the expansion valve 12 and the pipe 13 connect the condenser 9 with the expansion chamber 8, and the pipe 14 connects the expansion chamber 8 with the compressor 7, thus completing the refrigerant circulatory system.

`60 The shaft 15 of the motork has its end 16 portion ofthe cabinet 1 be positioned as desired the various culinary and household appliances which are operable by the shaft 15.

The compressor 7 which is secured to the motor 6 comprises a housing 20, a cylinder 21 formed integrally with the upper portion of the housing 20, and a hollow piston 22 operable in cylinder 21. Within the piston 22 and bearing at one end against the closed end 23 of the piston 22 and at the other end'y against the head 24 of cylinder 21 is a coil spring 25 normally tensioned to force the piston 22 downward for its downward stroke through cylinder 21. The shaft 15 of the motor 6 extends into the lower portion of housing 20 beneath the closed end 23 of y piston 22, and has an eccentric or cam 26 secured to the endthereof for operative con tact with the closed end 23 of piston 22. The cam 26 rotates with the shaft 15 and by its contact with the closed end 23 of piston 22 forcespiston 22 upward through cylinder 21 at` spaced intervals, and thus causes the up\ ward stroke of the piston.

Arecessed where it opens into chamber 30 to form the Iiange 32 around 'the end of passage 31 for supporting the movable valve plate 33 which covers the endof passage 31 and completes the intake valve for the com prcssor An internally` screw threaded opening 34 leading into the horizontal portion of cham- Y 80 1 Formed on the upper part of the housing ber 30 directly above the vertical end of intake passage 31, is provided in the top of housing 27. y

An electro-magnet 40 having a winding 41 and a core 42 extended beyond the winding 41 is secured in the opening 34 with the end of core 42 extended within the horizontall portion of chamber 30 to a point removed from and directly above the valve plate 33. The magnet 40 is tightly secured inthe opening 34 by the screw plug 43 which is secured around core 42 below the winding 41 and which has a flange 44 formed on its upper portion for overlapping the edges of opening 34, and external screw threads on its lower portion adapted to fit the threads of opening 34. The wires 45 and 46 extend to the source of electric current (not shown) and the motor 6 respectively, thus connecting the electro-magnet 40 in'series with the motor 6.

In Fig. 3 I have. shown a diagram of the electrical wiring/in which the electrical current is carried from its source through wire 45 to magnet 40, and from magnet 40 by wire 46 to switch 'terminal 47. Between the source of current and the magnet 40 the wire 45 is tapped by the wire which carries current to a control device 61 which consists of a tiltable bulb having mercurytherein, adapted when the bulb is tilted to make or break the circuit to control the operation of the motor 6. Various thermostatically operated devicesv for actuating the bulb in response to the temperatures within the cabinet 1 may be used,'one of which is the subject matter of my application for Letters Patent of the United States on control for refrigeration mechanism filed June 12, 1926, S. N. 115,686. The wire 62 connects the control device 61 with the switch terminal 49. The wire 50 leads from the switch terminal 48 to the motor 6 and the wire 52 leads from the motor 6 to ground, thus establishing a circuit through the motor 6 whenever points 48 and 49 or 47 are connected. Any suitable switch may be used toconnect terminal 48 and 49 or 47 to obtain a circuit through motor 6 and either the thermostatic control 61 or the magnet 40.

In operation, the motor 6 when supplied with current causes the operation of piston 22 in cylinder 21 of the compressor 7. Normally the downward stroke of piston 22 will cause the valve closure 33 to be lifted from flange 32 at the end of passage 31 and will draw refrigerant from the expansion chamber 8 through pipe 14, passage 31 and (hamber 3,0 into cylinder 21. The upward stroke of the piston 22 will compress the refrigerant, force the Valve closure 33 down against flange .32 and thus close the passage 31, and the compressed refrigerant will be forced out of cyhnder 21 through a suitable outlet valve 5 (not shown) into pipe 10 and so to the condenser 9, thus causing a circulation of refrigerant.

When it is desired to have the motor operate any of the various culinary and household appliances which may be attached to the end 16 of the shaft 15 without causing a circulation of refrigerant, the motor may be switched out of connection with the thermostatic control 61, thus causing the electric current to pass through .the winding 41 of the magnet 40 and energize the core 42 which will attract the metal valve plate 33, lift it from its seat on flange 32 and retain it against the end of core 42 so long as current is passing through windingy 41. The passage 31 is thus held open and the operation of the piston 22 in the cylinder 21 will merely move refrigerant back and forth through passage 31 and pipe 14 to the expansion chamber 8 without compressing it or forcing it into the condens.

er 9, consequently the refrigerant is not circulated through the system and no refrigeration takes place within the cabinet while the motor is being operated with the compressor intake valve open.

It will be obvious that various changes may be made in the arrangement, combination and'construction of the various parts of my improved device without departing from the spirit of my invention, and it is my intention to cover by my claims such changes as may be reasonably included within the scope thereof.

What I claim is:

1. In combination, a refrigerating system comprising a compressor, condenser and evaporator operatively connected together, a motor for driving said compressor, a thermostatically operated switch in series with said motor for controlling the operation thereof in accordance with the demands of said system, an inlet check valve for said compressor, a magnet positioned to open said check valve when energized, and switching means operable at will to place either said magnet or said thermostatically operated switch in series with said motor.

2. In combination with a mechanical tefrigerating system, a compressor, a condenser and an evaporator operatively connected together, an electric motor for driving said an electric motor connected tb said compressorfor simultaneous movement, a valve controlling the operativeness of said compressor,- electrically controlled means for rendering said valve inoperative, switching means a-utomatically controlled by predetermined conditions within saidsystem, an electric circuit Y connecting saidswitching means and said motor "in series,'a shunt circuit around said switching means including said electrically controlled means, and a manually operable switch for controlling said shunt circuit.

4L In a mechanical refrigeratin'g system, in

combination, a compressor, a condenser and an evaporator operatively connected together, an electric motor connected to sald compressor for slmultaneous movement, a valve f controlling the operativeness-vof said compressor, electrically controlled means for rendering said valve inoperative, switching means automatically controlled by predetermined onditions within said system, and means operable at will for connecting said electrically controlled means or said switchi ing means in Yseries with said motor.

5. In a mechanical refrigerating system, in combination, a compressor, a condenser and an evaporator operatively connected ,together, an electric motor connected to said compresserl for simultaneous movement, a valve controlling the operativeness of said compressor, electrically controlled means for rendering `said valve inoperative, switching means automatically controlled by predetermined conditions within said system, and means operable at will to electrically connect 'either said electrically controlled means orsaid switching means in series with said motor. f 6.' In a mechanical refrigerating system, in combination', a compressor, condenser andV evaporator connected in series, amotor con' nected to said compressor for simultaneous movement therewith, thermostatic switching;

means operatedby temperature changes in said-system,'a valve controlling the opera-- tiveness of said compressor` when said compressor is operating, electrical means for rendering said valve inoperative, means for electrically connecting said motori and said switching means in series, Yand manually operable means .for electrlcally-connecting said motor 1n ser1es` w1th-sa1d electrical means,

7. In a mechanical:nefrigeratingsystem, in a' compressor, condenser and combination,

' evaporator connected in series, a motor connectedto said compressor for simultaneous movement therewith, thermostatic switching .means operated by temperature changes in saidv system, a valve controlling` the ,operativeness of" said compressor when said compresser is operating, electrical means 'for rendering said valve inoperative, means for elecerable means for electrically connecting said motor in series with said electricaltmeans independently of said switchingsmeans.

v8. In a mechanical refrigerating system, in combination, a compressor, condenser and evaporator connected in series, a motor connected to said ycompressor for simultaneous movement therewith, thermpstatic switching means operated by temperature changes in said system, a valve controlling the operativeness of said compressor when said compressor'is operating, electrical means for rendering said valve inoperative, means for electrically connecting said motor and said switching means in series, and manually operable means for electrically connecting said motor in series with said electrical means and rendering said switching means inoperative for controlling said motor. THUMAS J". LTLE, JR.

trically connecting said motor and said switching means in series, and manually oplso 

